Oliver porter



acre cart OLIVER PORTER, OE WATERFORD, MAINE.

Letters Patent No. 109,246, dated November 15, 1870.

IMPROVEMENT IN ROOFING-CEMENT;

The Schedule referred to in these Letters Patent and making part of thesame.

To all whom it may concern Be it known that I, OLIVER PORT-ER, ofWaterford, iuthe county of Oxford and State of Maine, have invented anew and useful Improvement in Cement for Roofing and other purposes; andI do hereby declare that the following is a full, clear, and exactdescription thereof, which will enable others skilled in the artto makeand use the same.

This invention relates to a new and useful improvement in a cement moreespecially designed for roofing, but which may be used for otherpurposes where it is desired to exclude. moisture and form a fire-proofsurface; and

It consists in a composition formed of the ingre-.

dients and in the proportions hereinafter named.

The roofing cements which have heretofore been offered to the publichave been composed of materialsdinary intelligence.

In carrying out my invention and discovery, I make use of the followingingredients in about the proportions named:

For a quantity of the cement sufficient to cover a space ten feetsquare, I use of sand one quart; common ashes, sifted, two quarts; clay,pulverized, three quarts; linseed oil, three-pints; coal-tar, threegallons.

These ingredients are thoroughly mixed together, and may be applied invarious ways. It may-be applied directl y to a wood surface, but foraroof a layer of prepared paper (common roofing paper) is desirable,although by no means indispensable. The coating may be of any desiredthickness, and, being tough and elastic, it

is not perceptably afiected by heat or cold, and is water andfire-proof.

Having thus described my invention,

I claim as new and desire to secure by Letters Patent A cement forroofing and other purposes, composed of the ingredients and in about theproportions specified, substantially as and for the purposes set forth.

OLIVER PORTER.

Witnesses:

ALFRED S. KIMBELL, DAVID W. PURINTOX.

